When is time to leave a band?

The situation sucks.

I've been invloved in a Christian rock band for three years, playing rhythm guitar. I have never been a band prior to this one, so I would guess that I am a rookie when it comes to dynamics and relationships within a band. I will not go into any details on what has been happening, but suffice it to say I am seriously considering leaving the group. I feel my reasons are legitimate, and that there is not a very good chance the underlying issues can be resolved.

So I am faced with a dilema, of sorts. Do I stay and try to find a way to mitigate those unresolved issues? Or would it be better to walk?

I am hoping for any insights or wisdom which can be shared with me which might shed light on things I have not considered.

hmmm, after reading this, sounds almost like a "Dear Abby" letter....